Shoe-trimming machine



Aug. 14, 1928.

B. JORGENSEN sHoE- TRIMHING MACHINE Filed Dec. 6, 1923 Patented Aug. 14, 1928.

UNITED STATES PATENT o icE.

EERNHARDT J'ORGEN SEN, OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO UI TITEE SHOE 'MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW masnx.

SHOE-Tamarin nacnms.

Application a December 6, 1923. Serial No 679,040.

This invention relates to trimming ma: chines and more articularly to machines used in the manu actureof shoes to trim surplus material from the [bottoms of lasted shoes before the solesare laid.

One well-known type of shoe is made with a canvas upper and a rubber. outsole, and the latter is secured to the bottom of the lasted shoe by vulcanization without any stitching or other fasteningl means except that an adhesive is used to old it prior to and during the vulcanizing operation. In a shoe of the type mentioned the insole has a smooth bottom surface since adhesion is and vulcanization are relied upon exclusive- 1y to form the upper. Incidentallyto lasting a .shoe of this type the over-drawn marginal portion of the upper is temporal-i1 fastened to the insole by adhesion, and alt ough care is exercised v, to keep said, marginal portion as smooth as possible it is impossible to avoid forming pleats or crimps where the upper is lasted aroundthe toe. i

i A satisfactory bond between the outsole and the upper cannot be obtained by vulcanization unless the bottom of the lasted shoe is smooth and even, and it is therefore necessary. to trim the crimped or pleated fore it has been the practice to perform this trimming operation either by hand or too slow to be economical, while a" bufiin operation'is both too slow and productive o unsatisfactory results. a In view of the foregoing considerations an object of this invention, is to provide an improved machine for trimming surplus the. face of the insole'of' a lastedshoe,and more. especially one adapted to trim off the pleats or crimped portions of a canvasupper secured to the bottom face of the insole by an adhesive, to put the shoe in satisfactory condition for a rubber outsole to be vul-.

canized thereton Y It is difiicult to trim textile materials with a single cutting edge, but the character of the shoe under consideration is such that it is impossible to operate satisfactorilywith shearing members. This condition is met a union between the sole and portions flush with the actual bottom of the shoe before the outsole is laid. Hereto- V with a buffing machine, but hand work is by that feature of the invention that comprises a power-operatedknife arranged to execute a drawing .cut, and a shield arranged to be engaged by the bottom ofthe shoe to control the closeness of trimming and, yet to permit the knife to trimthe pleated portions of the upper flush Another feature of the invention consists in organizing the aforesaid knife and shield 'to be relatively adjustable for'the purpose of regulating the closeness of {trimming Still another feature. consists in a novel combination comprising the aforesaid-shield Consequently, as it becomes necessary to adust the shield to, compensate for grinding the knife to sharpen it the guiding means will necessarily receive a correspondingadjustment and the operative will have the advantage of substantially constant operating conditions.

Another feature comprises a novel guard formed and arranged to protect the work and the operatives fingers from injury by the trirnming knife, and at the same time to the actual bottom of the sole.

and means for guiding the shoe by engageto afford anunobstructed view of the operf' ating" portion of the knife. As shown, this guard is of skeleton construction and is formed of a single length of rod or wire bent to suitable shape. It is preferably atpositionfor. operation itwillbe readily deflected and displaced bythe surplus portions of material approaching theknife and will remain in contact with the'work or soclose to it as to continue to safeguard the operatives fingers. I

vOther features of the invention are hereinaftcr described and claimedaud are illus ranged 3 to'standnormally in frontwof the overdrawn upper material that lles against trated by the accompanying drawing in which,--

Fig. 1 is a perspective view of a trimming machine and a portion of a lasted shoe in operative relation thereto;

Fig. 2 is a top plan view including the trimming knife, the grinding wheel, the toe portion of a lasted shoe in operative position, and the guards partly broken away;

Fig. 3 is a perspective view partly in section and looking upwardly toward the trimming knife and the elements adjacent thereto; and

Fig. at is a vertical section of the mounting for the grinding wheel.

The frame of the machine is formed with an overhanging arm ll in which separate journals ll} 12 are formed to provide bearings for a vertical cutter shaft 13. A disk knife 14 is fastened to the lower end of the shaft and the latter is held against endwise movement by a collar 15 arranged between the journals 12, 12. A pulley 16 is fastened to the upper end of the shaft, and a driving belt 17 is guided thereto by idle pulleys 125, 18 mounted at the rear of the frame. The upper marginal portion 19 of the knife is beveled'to provide a sharp cutting edge.

A segmental guard 20 is provided with a hub 21 and this is fastened to an extension of the lower journal 1:2 by any suitable means such as a set-screw This guard overhangs the trimming knife and is provided with a depending flange :23 that surrounds the major portion of the cutting edge, a relatively small portion of the guard being cut away to expose the operating portion of the knife as shown by Figs. 1 and 2. The hub of the guard 90 is bored at diametrically opposite points to receive the end portions 25, 25 of an auxiliary guard Ql which may be made of a loop of relatively heavy wire. That portion of the guard 20 that overlies the trimming knife serves to support the auxiliary guard in a substantially horizontal position but permits the The auxiliary guard is so formed as to afford an unobstructed view of'the trin'n'ning locality from above. The end portions 25, 25, which constitute trunnions, are free to turn in their bearings formed in the hub 21 so that theouter portion of the auxiliary guard may be lifted by the work. 7

As shown by Fig. 3, a segmental shield consisting of a thin plate 26 is arranged under and conti n1ous to the trimmin knife to guard against cutting the insole while permitting the. knife to trim the lumps flash. This shield, which controls the closeness of trimming, is preferably mounted so that it may be adjusted forward and back and also sidewise'to cover and uncover portions of the knife, as desired. As shown, it is supported by, and rigidly fastened to, a block 82 on the rear side of which is formed a dovetail portion 27. The latter is clamped adjustably in a correspondingly formed portion of a holder '28 which split by a kerf 29 and provided with a clamping bolt; fl The front face of the block 32 is formed to provide two spaced abutments ill which are arranged below the level of the cutting edge of the knife 1-l to be engaged by the perimeter of the shoe to guide the latter. The space between the abutmeuts 331 is preferably just wide enough to receive the toe of the shoe when the heel end swings from one side to the other. The shield-holder :28 is mortised into a portion 33 of the :l'rame aml is fastened to the latter by a clamping bolt 23%. it slot 35 extending from front to rear ati'ords adjustment of the holder relatively to the frame, while the dovetail portion 27 and the correspondingly formed portion of the holder a'l'l'ord ad ustment of the shield from side to side. Vertical adjustment of the trimmiin knife is all'orded by loosening the collar lo, the latter being provided with a set-screw 36 to engage an elongate il spot 37 on the shaft 13.

The lasted shoe shown by Figs. 1 and 2 comprises a canvas upper 38 and an insole. the bottom face'tlf) of which is usually coated with a suitable adhesive such as a quick-drying cement. The marginal portion 40 of the upper, which may also be coated with adhesive, has been secured to the face 5) of the ins le by the adhesive. As a result of the lasting operation the marginal portion of the upper becomes crimpcd. and the lumps ll produced thereby require to be trimmed oil to make the bottom smooth and even before the rubber outsole laid.

in using, the described machine to trim oil the lumps ll the operative hohh th shoe bottom up and usually begins to trim at or near the ball portion by holding the shoe so that the heel is to the left and the toe to the right. The trinunin; knife rotales continuously at high speed and ll'llllr: auxiliary guard to be ra1sed by the work.

oil the lamps with a drawing cut as the operative moves the shoe from right to left while holding the a-rimeler ol' the slice against the abutments ill and the overdrawn marginal portion of the upper against the under s'le of the shield ill. When the int end of the shoe reaches the trimming local ity the operative swings the heel end to ward himself and at the same time from left to right. The material to be trinuned pas es under the. lllXllitllfi' guard Al and also under the flange 2;; of the tired guard 2 the auxiliary guard rising. if necessary, to pass over the lumps 1. The auviliauv guard thereforeoffers no appreciable resistance to the feeding and manipulation of the shoe since it lSlllilt'lC of round wire and is not only smooth but so light as not to be felt. it that stage of the trimming llu lflt

ISt

. when the heel end of the shoe is swinging from one side to the other the toe end may enter the recess betweenthe abutments 31,

the effect of the recess being to .arrest or retard the feeding motion temporarily or until the position of the shoe has been nearly if not entirely reversed. As the opposite side of the forepart is moved into contact with one of the abutinents 31' it retracts the toe end from the recess so that the perimeter. of the shoe may thereafter slide on both abutments. As shown by Fig. 2, the lumps have been trimmed from one side of the shoe, while the pleats 41 form lumps that have still to be trimmed. The notches 42 are the result of trimming off the pleated portions that form the lumps. The closeness of trimming is controlled by the shield 26 which is. engaged by the trimmed marginal portion and is preferably adjusted so that only a relatively narrow portion of the trimming knife is permitted to have contact with the work. lVhen the shield is adjusted to uncover more of the cutting portion of the knife closer trimming is possible, since the shoe may be rocked as much i or as little as desired incidentally to its manipulation.

The work-engaging portion of the guard 24: stands initially at or below the levelof the knife, and inease the operative presents the work too high this guard arrests the work positively and thereby prevents the knife from cutting the perimeter ofthe shoe.

The operative can therefore present the work only by first passing it under the guard and then raising it to the necessary level,

but since this manipulation would usuallyplace a portion ofv the shoe under the knife, if not also under the flange 23 and shield 26, it insures immunity of the shoe from damage by the knife.

A shaft journaled in a bearing sleeve 51 carries a grinding wheel 52'for sharpening E the cutter 14. The sleeve 51 is supported by trunnions 53, 53 in a-yoke- 54. ,Theyoke is fastened toqthe base of the frame 10. The trunnions are preferably capable of holdingthe sleeve frictionally in any po-' sition to which it may betilted, and for this purpose they are: screwed into the yoke and are provided with conical ends which occupy sockets formed n the sleeve as shown by Fig. 4:- The axis of the grinding wheel is substant ally at right angles to that of the cutting knife, and the periphery of the grinding wheel is arranged to grind the beveled marginal portion 19. Res

. ferring more particularly to Fig. 2, the

angular relat'ion between the line of travel of the knife at the point of'contact and the axis of the grinding wheel is such that rotation of the knife induces relatively slow rotation of the grindingwheel, thus equalizing the wear on the wheel. The greater enough for trimming. merely to bear down slightly on the leftportion.

component of grinding movement is executed 'by the knife while the lesser component is 'enecuted by the grinding wheel. So long as the griiiding wheel is in contact with the trimming knife it wlll continue to rotate under the influence of the'latter, but it will not follow automatically as the knife is ground away because the frictional trunnions have sufiicient holding effect to sustain the weight of the wheel.

.Thework required of the knife for the particular purpose described demands a sharp cutting edge at all times, and it is therefore necessary to use the grinding wheel frequently'but only for a very few seconds at any one time. Consequently it is desirable to maintainthe grinding wheel in proximity to the cutting knife so that no time will be lost in movingit to and from operative. position. In practice it is suf-' ficient 1f the grinding wheel 15 retracted one eighth or even onesixteenth of an inch from the knife when the latter is sharp The operative has hand end of the sleeve 51 to separate the grinding wheel from the knife, the frictional trunnions thereafter sustaining the wheel out of contact with the knife until the force the grinding wheel against the trimming knife.

Having thus described my invention,

what I claim as'new and desire to secure by Letters Patent of the United States is:

1. A machine, of the character described,

comprising a rotary disk-knife arranged to trim lumps from the. overdrawn marginal portion of anupperlymg on the 1nsole of a a lasted shoe, and a shield arranged in con:

tiguous relation to the body of the knife to bear on the trimmed part of said marginal 2. A comprising a rotarydisk-knife arranged to trim lumps from the overdrawn marginal portion of an upper lying on the insole of a lasted shoe, and a stationary shield arranged in contiguous relation to the body of the marginal portion. 1

35A machine ofthe character described, comprising a rotaryjdisk-knife arranged to trim lumps from the .overdrawn marginal portion of an upper lying on the insole of a lasted shoe, and a thin shield arranged in contiguous relationto the body of-lthe knifemachine of thecharacter described, A

knife to bear on the trimmed part of said till (til

to bear on the trimmed part of said marginal portion, said shield being adjustable transversely of the axis of said knife to corer more or less of the marginal portion of the knife at the trimming locality.

l. A .machine of the character described, comprising a power-operated knife arranged to trim lumps from the ()Vttl'tll'tlWIl marginal portion of the upper lying on the bottom of a lasted shoe. and a guard arranged in confronting relation to the face of the knife to control the closeness of trimming by engaging the trimmed area of the work.

A machine of the character described, comprising a powcr-operated knife arranged to trim lumps from the over-drawn marginal portion of the upper lying on the bottom of a lasted shoe, and a stationary guard arranged to lie between the knife and said marginal portion to control the closeness of trimmingby engaging said portion, said guard and said knife being relativeh adjustable to regulate the closeness of trimming.

(5. A machine of the character described, comprising two spaced abntments arranged to be engaged by the perimeter of a lasted shoe to guide the latter, a cutter arranged to trim surplus material from the bottom of the shoe adjacent to the points of contact: withsaid abutmcnts, mechanism for operating said cutter, and means arranged to engage the bottom of the shoe to control the closeness of trimming.

7. A machine of the character described, comprising two spaced abutments arranged to he engaged by the perimeter of a lasted shoe to guide the latter, a cutter arranged to trim surplus material from the bottom of the shoe adjacent to the points of contact with said abutments, mechanism for operating said cutter, and a guard arranged to lie between said cutter and the shoe to control the closeness of trimming by engaging the bottom of the shoe.

A machine of the character described, comprising a trimming knife having a cutting edge for trimming surplus material from the bottom of a lasted shoe, means for moving said knife lengthwise of its cutting edge. a thin plate supported in confronting relation to said knife and arranged to engage the bottom of the shoe to control the closeness of trinnning. and means arranged to engage the perimeter of the shoe to guide it relatively to the knife.

9. A machine of the character described, comprising means for trimming surplus material from the bottom of a lasted shoe, adjustable means arranged to control the closeness of trimming by engagement with the bottom of the shoe, and adjustable means arranged to guide the shoe by engagement with its perimeter, the latter two of said means being connected to partake of one adjustment.

10. A machine of the character described, comprising means for trimming surplus material from the bottom of a lasted shoe, means arranged to guide the shoe by engagement with its periphery, and means supported by said guiding means and arranged to control the closeness of trimming by engagement with the bottom of the shoe.

11. A machine of the character described, comprising means for trimming surplus material from the bottom of a lasted shoe, means arranged to control the closeness of trimming by engagement with the bottom of the shoe, and means arranged to guide the shoe by engagement with its perimeter, one of the latter two of said means being adjusts able and the other being rupported thereby to partake of its adjusting movement.

12. A machine of the character described, comprising means for trimming surplus material from the bottom of it lasted shoe, means arranged to control the closeness of trimming by engagement with the bottom of the shoe, and means arranged to guide the shoe by engagement with its perimeter, said controlling means being adjustable to regulate the closeness of trimming, and said guiding means being connected to said controlling means to partake of its adjusting movement.

13. A machine of the character described, comprising means for trimming surplus ma terial from the bottom of a lasted shoe, and an adjustable unit including a shield arranged to control the closeness of trimming by engagement with the bottom of the shoc, and two spaced abutments arranged to guide the shoe by engagement with its PCIlnlUtt'l.

14. A machine of the character described, comprising means for trimming surplus material from the bottom of a lasted shoe, a member arranged to guide the shoe by engagement with its perimeter, and a shield supported by and projecting from said guiding member to control the closeness of trimming by engagement with the bottom of the shoe said guiding members being adjustable to regulate the closeness of trimming byadjusting said shield relatively to said trimming means.

15. A machine of the character described, comprising a work-rest for engaging the perimeter of a. lasted shoe, a shield projecting from said work-rest to bear on the ovcrdrawn portion of the upper lying on the marginal portion of the insole. and a cutter arranged to trim pleats from the bottom of the shoe adjacent to said shield.

16. A machine of the character dcscril'ied, comprising a mechanically operated cutter arranged to trim surplus material from the bottom of a lasted shoe, and a guard arranged to stand normally in front of said cutter to prevent a frontal presentation of the shoe to the cutter, saidguard being displaceable by the work if the latter be presented otherwise than frontally to the cutter.

17 A machine of the character described, comprising a mechanically operated trimming cutter under which the trimmed Work passes, and a guard arranged to stand normally in front of the cutting edge of said knife, said guard being displaceable by the i work.

7 surplus material and being movable by the work to avoid hindering manipulation of the latter.

19. A machine of the character described, comprising a cutter arranged to trim pleats from the overdrawn marginal portion of an upper lying on the insole of an inverted lasted shoe, means formed and arranged to prevent the operatives fingers from touching said cutter elsewhere than at the trimming locality, and a guard arranged to prevent the fingers from touching said cutter at the trimming locality, said guard being also arranged to rest on the surolus material and to yield to the demands 0 its irregularities.

20. A machine of the character described, comprising a stationary frame, a shaft journaled therein and arranged to rot-ate about a substantially vertical axis, a diskknife carried by said shaft and arranged to trim pleats from the overdrawn marginal portion of the upper lying on the insole of a lasted shoe, and means arranged to prevent the 0peratives fingers from touching the edge of the knife while they present and manipu late the shoe in contact with the knife, said means being formed to afford an unobstructed view from above the knife of the working portion of thelatter.

about a substantially vertical axis to trim pleats, from the overdraWn marginal portion of the upper lying, on the insole of a lasted shoe, a stationary support, and a knife-guard consisting of a loop of wire the end portions of which are journaled'; in said stationary support to serve as trunnions, said guard being arranged to bear on the Work and turn on said trunnions according to the demands of the work.

22. A trimming machine comprising a substantially vertical driven shaft ournaled in a fixed support, a disk-knife carriedby said shaft and arranged to trim upper material lying against and adhering to the face of the insole of an inverted cement-lasted shoe, and a guard arranged adjacent to said knife to protect the operators fingers from being out while manipulating the shoe in engagement with said knife.

23. A machine of the character described,

comprising a knife formed and operated to execute a drawing out and arranged to trim lumps from the overdrawn marginal portion of an upper on the bottom of a lasted shoe, and a thin shield arranged in confronting relation to the body of said knife to engage the trimmed part of the work, the cutting edge of said knife being in front of the front edge of said shield.

24L. A trimming machine comprising a substantially vertical driven shaft journaled in a fixed support, a disk-knife carried by said shaft and arranged to trim upper material lying against and adhering to the face of the insole of an inverted cement-lasted shoe, and a Work-rest arranged below the level of the cutting edge of said knife to en- 7 gage the perimeter of the shoe to guide it relatively to said knife.

In testimony whereof I have signed my name to this specification.

BERNHARDT JoReENsEN. 

